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Altera_Forum's avatar
Altera_Forum
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12 years ago

how to write a costum gpio interrupt driver

I want to write a custom gpio interrupt driver. I just want to trigger the led in interrup handle function.

In my probe function I register interrupt and initial the registers.

I can see the interrupt number in /proc/interrupt after booting.

Like below

197: 0 0 GIC gpio_key

but the interrupt handle function nerver execute.

What is the problem with the driver？

5 Replies

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    11 years ago

    Thanks in advance.

    I'm having trouble compiling my custom device driver. I'm using the 14.1 tools.

    My compiled linux is in /home/user1/linux-socfpga

    My cross compiler is in /home/user1/gcc-linaro-arm-linux-gnueabihf-4.8-2013.12_linux/bin/arm-linux-gnueabihf-

    My device driver is in /home/user1/newDriver

    I'VE TRIED LOTS OF THINGS - and googled for a few hours

    One was -- from the newDriver directory I tried:

    # ] make ARCH=arm CROSS_COMPILE=/home/user1/gcc-linaro-arm-linux-gnueabihf-4.8-2013.12_linux/bin/arm-linux-gnueabihf- KERNEL_SRC=/home/user1/linux-socfpga

    IT TRIES BUT CAN'T FIND the kernel header files.

    Any help would be greatly appreicated.
  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    11 years ago

    --- Quote Start ---

    Thanks in advance.

    I'm having trouble compiling my custom device driver. I'm using the 14.1 tools.

    My compiled linux is in /home/user1/linux-socfpga

    My cross compiler is in /home/user1/gcc-linaro-arm-linux-gnueabihf-4.8-2013.12_linux/bin/arm-linux-gnueabihf-

    My device driver is in /home/user1/newDriver

    I'VE TRIED LOTS OF THINGS - and googled for a few hours

    One was -- from the newDriver directory I tried:# ] make ARCH=arm CROSS_COMPILE=/home/user1/gcc-linaro-arm-linux-gnueabihf-4.8-2013.12_linux/bin/arm-linux-gnueabihf- KERNEL_SRC=/home/user1/linux-socfpga

    IT TRIES BUT CAN'T FIND the kernel header files.

    Any help would be greatly appreicated.

    --- Quote End ---

    SOLUTION: Here is the Makefile

    KERNEL_DIR=/home/user1/linux-socfpga

    obj-m := testDriver.o

    PWD := $(shell pwd)

    default:

    $(MAKE) M=$(PWD) ARCH=arm CROSS_COMPILE=/home/user1/gcc-linaro-arm-linux-gnueabihf-4.8-2013.12_linux/bin/arm-linux-gnueabihf- -C $(KERNEL_DIR) SUBDIRS=$(PWD) modules

    clean:

    $(MAKE) -C $(KERNEL_DIR) SUBDIRS=$(PWD) clean